| Thomas Mercer Jones | |
| Birth Date: | 1795 |
| Birth Place: | England |
| Death Place: | Toronto, Ontario, Canada |
| Monuments: | Ontario Historical Plaques: Thomas Mercer Jones, 1795 - 1868 |
| Occupation: | Businessman and Banker |
| Years Active: | 53 |
| Employer: | Canada Company and later Bank of Montreal |
| Known For: | Inspiring Stratford, Ontario's name. |
| Co-Commissioner of the Canada Company | |
| Term: | 1829–1850 |
| Predecessor: | William Allan |
| Successor: | Frederick Widder |
| Party: | Family Compact and later Colborne Clique |
| Opponents: | Colborne Clique and later Family Compact |
| Spouse: | Elizabeth Mary Strachan |
Thomas Mercer Jones (1795 - 2 October 1868) was an English-born administrator who arrived in Upper Canada in the 1820s and was employed as a commissioner of the Canada Company based in Goderich. A series of internal conflicts led to his dismissal in 1852. He died in Toronto.